As a title, I should export data from excel
I'm testing, but I can not do what I want
problem
The titles of the films are imported but the content actors in the field "Leading Role" I can not
It displays an error
does anyone help me?

2) how do I understand which "IDs" are available,
this works fine with an empty database, but if I have a databe with many movies with their "ID" how do I establish which one is available?
same speech for the actors and their "ID"

2) how do I understand which "IDs" are available, this works fine with an empty database, but if I have a databe with many movies with their "ID" how do I establish which one is available? same speech for the actors and their "ID"

Importing will ALWAYS create new records. You cannot update existing records with import.

3) how to manage duplicates

I believe this to be related to my #2 answer.

I noticed a problem "Leading role" and imported but in the "Credits" tab of Linda Blair and empty